9(-7r-8)=

Solution for 9(-7r-8)= equation:

Simplifying
9(-7r + -8) = 0

Reorder the terms:
9(-8 + -7r) = 0
(-8 * 9 + -7r * 9) = 0
(-72 + -63r) = 0

Solving
-72 + -63r = 0

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '72' to each side of the equation.
-72 + 72 + -63r = 0 + 72

Combine like terms: -72 + 72 = 0
0 + -63r = 0 + 72
-63r = 0 + 72

Combine like terms: 0 + 72 = 72
-63r = 72

Divide each side by '-63'.
r = -1.142857143

Simplifying
r = -1.142857143